{"cve":"CVE-2026-34217","nvd":{"published":"2026-04-06T16:16:34.890","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, a scope modification vulnerability exists in @nyariv/sandboxjs. The vulnerability allows untrusted sandboxed code to leak internal interpreter objects through the new operator, exposing sandbox scope objects in the scope hierarchy to untrusted code; an unexpected and undesired exploit. While this could allow modifying scopes inside the sandbox, code evaluation remains sandboxed and prototypes remain protected throughout the execution. This vulnerability is fixed in 0.8.36.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","score":7.2},"cwes":["CWE-668"],"references":["https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w","https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w"],"products":["nyariv:sandboxjs"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-34217","score":0.00292,"percentile":0.21617,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-hg73-4w7g-q96w","url":"https://osv.dev/vulnerability/GHSA-hg73-4w7g-q96w","summary":"SandboxJS: Sandbox Escape via Prop Object Leak in New Handler","modified":"2026-04-06T23:34:35.032348Z","packages":[{"ecosystem":"npm","name":"@nyariv/sandboxjs","purl":"pkg:npm/%40nyariv/sandboxjs","ranges":["<0.8.36"],"fixed":["0.8.36"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}